Puppet-valve.



No. 846,077. A PATENTED MAR. 5, 1907.

R. WISHON.

` PUPPET VALVE. APPLIOATYION FILED AUG. 23, 1905.

I-I Q@ 22 wlTNE'ssEs: ,3 mvENTon- @wwf www ATTORNEYS UNITED STATES PATENT! OFFICE.

1 RALPH WISHON, oF COLUMBUS, OHIO.

'PUP-PET-VALVE.

To all whom it may concern:

Beit -known that I, .RALPH WIsHoN, a. citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Pu et-Valves, of which the following is a spec1 cation.

My invention relates to new and useful im rovements in uppet-valves.

he object of the invention is to provide a suitable guide for the valve-stem, to roduce a greater bearing-surface, and to re nce the wear on the stem and cause the valve to seat truly.

Another feature resides in the provision of means for positively turning the valve-head on its seat'prior to its movement therefrom.l

sar

X still further object is to provide mechanical means for 'assuring a positive turnmg of the valve and tb prevent any movement ofv the valve from its seat until the turning movement has been completed. .l

Finally, the object of the invention is to provide a device of the character described that will be strong, durable, efficient, simple,

and inexpensive to make and one in which the several parts will not be liable to getout of working order.

With the above and other objects in view the invention consists of the novel details of construction and operation,- a preferable embodiment of which is described in the speciication and illustrated in the accompanying drawings, wherein- Figure 1 is a transverse vertical sectional view of m improved valve 'and a portion of the cylin er-head on which it is mounted,

ortions of the valve-operating Incechanism eing shown in elevation. Fig. 2 is a plan view of the cap portion of the outer sleeve, and Figiv v3 is a transverse sectional view through thetappet and its paWls.

In `the drawlngs, the numeral 1 designates a portion of the cylinder-head, which is provided with the usual ort 2 and valve-casing opening 3. Within t e opening 3 a suitable valve-casing 4, having communication with Specification of Letters Patent.

Application led Augnst'ZS, 1905. -Serial No. 276,876.

' Patented ini-ch 5,1907.

the' ort 2, is sn l tted.- The casing is provlidedwith a lilsnge 5, which rests 'on the outer surface ofthe head 1 and through which screw-bolts 6 are assed into the head to hold the casing in p ace. The casing is formed at vits lower end `with an annular inclined valve-seat 7, in contact with which an annular conical valve-head `8 closely engages. yAnelongated stem 9 extends from the head 8, passing through the central portion of the' casing 4. The stem rojects some distance beyond the casing an passes through a sleeve 10, anged at its lower end l and secured u on the valve-cas' by screwbolts 11, Whic pass through the anged portion. The sleeve 10l its snugly about the stem, so as to act as a guide and revent lateral play, but loosely enough to a 0W the stem a free longitudmal movement. An outer sleeve 12 ts snugly aboutthe sleeve 10 so as to freely slide thereon and .is provided with a cap portion 13, the latter being provided with an annular collar 14. The sleeve 10 extends into the sleeve 12 some distance, so as tp assure a free and eas movement ofthe sleeve 12 Without the iabilit of the same getting out of alinement. coiled spring 15, confined between the collar 14 and the anged portion of the sleeve 10, is

held in place at its lower end by an annular' ycollar 16, formed about the sleeve 10.

`The spri'n 15 is tensioned so as to move the valvestem ongitudinallyand draw the head 8 into close engagement with the valve-seat 7, the sleeve 10 terminating a suicient distance from the cap portion 13 of .the sleeve 12 to allow the latter liberal play.

The spring thus bein under tension will immediately draw theI ead 8 to the seat when pressure exerted on the capto open the valve is relieved.

The u per end of the valve-stem isscrewthreade and passed into the lcap portion, and a Cotter-pm 17, passed through the ca and the stem, locks the parts together an prevents independent movement. On the upper surface Ofthecap a rin of ratchetteeth 18 is provided. These teet as shown in the drawing have been somewhat enlarged IOO for the pur oses of illustration; but it is to be.

understoo that in ractice the comparatively fine, t ere being about thirt two teeth to the inch., Su ported direct y above the cap and the teet 18 -I provide a tappet `19, `which is provided on op osito si es with angular recesses 20. ,'In e reare to -be IIO i' cesses pawls 21 are pivotall mounted on pawls a swinging movement at their free' ends substantially e ual the distance be- -tappet is 'moved toward the ca pins 22.

The pawls bear at t eir upper ends against the sur ace of the recesses, so that all force exerted on the pawls is absorbed by the tappet, thus taking the strain ofi the pins. The recesses 20 are flared, so as to allow the tween two of the teet 18. The awls normally rest in contact With one Wal of the recesses, as clearly shown in liig. 1. When te 13, t e lower ends of the pawls 21, whic i are provided with teeth, will engage with the teeth of the 'ring 18, and continuedmovement of the tappet will cause the pawlstovswing to one side, and thus impart a slight turning movement to the cap and the valve-stem before the tappet comes in contact with the cap and Without moving any of the parts longitudinally. The parts are thus given a full one-tooth movement, as the pawlscan only move the distance allowed by the recesses. When the pawls have been swung to the endv of their movement, continued movement of the tappet 4Will cause it to engage with the ycap portion 13 and move the valve-stem 9 and sleeve 12 longitudinally against the tension of the spring 15, and thus move the valvehead 8 from its seat 7. The sleeve y10 being xed to the valve-casing serves as a guide for the valve-stem 9 and the sleeve 12,Which also acts as a guide, all liability of lateral play or of the valve-stem moving out of alinement being thus obviated.

.Particular stress is laid on the turning of the valve-head 8 on the seat' 7 prior to the initial movement of the valve-head from the seat. This being accomplished by mechanical means such as I have described assures a positive action, and the possibility of the valve-head being moved from the seat prior or during the turning movement is reduced to a minimum, so that the seat and-the valvehead are at all times free from deposits or rough surfaces. It will be obvious that the valve-seat` being ground by the turning of sedeva' the valve-head at each movement thereof will require `less attention and the periods when regular 'grinding becomes necessary will be greatly'lengthened.A s

For operating the ta pet 19 i have shown the same supported on the end of a rocker-arm 23 to which itis secured by a screw-threaded stem 24 anda nut 25. rlhe rocker-arm 23 is pivotally supported centrally at the upper 'end of a post 26, formed on the flange 5 of the valve-casing 4. To the outer free end of the rocker-arm a rod 27 is pivot-ally connected-said rod being connected to the opertype of device to which the valve is applied. It will be apparent, however, that the movement or throw of the valve-head can be governed by therod 27, which when moved longitudinally will cause the arm 23 to swing and throw the tappet 19 into and out of contact with the capfportion 13.

-Having now fully described my invention,

what l claim, and desire to secure by Letters Patent, is--v 1. A valve provided with a stem and a head, telescopmg sleeves' for guiding the valve-stem and maintaining the same in alinement, a suitable seat for the head, mechanical means for 'positively turning the valve-head on the seat beforev moving the same from the seat, and resilient means surrounding the sleeves for holding the head of the valve to the seat.

` 2. The combination with a valve and valve-stem, of a toothed member to which said valve-stem 1s secured, a reciprocatory member arranged adjacent said toothed' ating means, which will be governed by the 

